| Most of the Russian dealers have these which originate in Russian. Here is an older one that is from the U S A that came out of an old collection. These are typically used for optical lens, computer chips, electronic sensors, and others uses. They are also now used to facet. The Quartz faces and miller indices can be seen or marked. The irregular growth illustrates the c axis. It is colorless and not the yellow tint shown in the one photo. These make interesting additions to a mineral collection. |
